If not, then you soon will. Rest assured that your energy provider is gearing up to give you a springtime heart attack!
This could all have been so easily avoided if you had asked us to fit our BFRC energy rated windows a few months ago. You would have had a far warmer house, resulting in the boiler being turned right down, and your energy supplier hoping that you developes a significant gas leak on the domestic side of your meter, thus being able to charge you for gas you had'nt used.
So make their day now and have our energy rated windows fitted to your home!